I like to have my Inbox sorted so that it sorts by Flag, but also such that the newest emails (the ones coming in without a flag) appear at the top, sorted by Date in Descending order.

The best I have been able to do is make it so that it does what I want except the incoming mails are sorted in Ascending order. That is because when I choose the Sort By option, I only can choose to sort my Flags, which I need to have sorted in Ascending order.

Is there a way to have Flags in Ascending order, but the non-flagged in Descending order?

Failing that, is there a way to make it so the Flag colors are ranked in the opposite order? Then I could do both in Descending Order and it would all work out.